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Three Forks - Trident, Montana, USA

FormationThree Forks
MemberTrident
Age:371 - 359 Ma
Late/Upper Devonian
IntervalFamennian
Lithologyshale
Number of Collections9
Number of Occurrences37

Recorded Sample Locations

LocationRegionStratigraphic Name
Dry Hollow off Milligan CanyonJefferson County, Montana, USAThree Forks - Trident
Mud Springs Sector of Three Forks QuadBroadwater County, Montana, USAThree Forks - Trident
TF-1Jefferson County, Montana, USAThree Forks - Trident
Red HillJefferson County, Montana, USAThree Forks - trident

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Three Forks - Sappington372 - 359 Ma
Late/Upper Devonian
4

Recorded Fossils

Accepted NameHierarchyAge
Cleiothyridina sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Athyridida : Athyrididae : Cleiothyridina372.2 - 358.9 Ma
Late/Upper Devonian
Schizophoria striatula
species
7Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : Schizophoria : Schizophoria striatula372.2 - 358.9 Ma
Late/Upper Devonian
Camarotoechia sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Camarotoechiidae : Camarotoechia372.2 - 358.9 Ma
Late/Upper Devonian
Leiorhynchus sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Leiorhynchidae : Leiorhynchus372.2 - 358.9 Ma
Late/Upper Devonian
Cyrtospirifer sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtospiriferidae : Cyrtospirifer372.2 - 358.9 Ma
Late/Upper Devonian
Tylothyris sp.
genus
6Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Mucrospiriferidae : Tylothyris382.7 - 372.2 Ma
Late/Upper Devonian
Productella coloradensis
species
7Animalia : Brachiopoda : Strophomenata : Productida : Productellidae : Productella : Productella coloradensis372.2 - 358.9 Ma
Late/Upper Devonian
Leptodesma sp.
genus
6Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : Leptodesma372.2 - 358.9 Ma
Late/Upper Devonian
Carinoclymenia sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Carinoclymeniidae : Carinoclymenia370.6 - 364.7 Ma
Late/Upper Devonian
Platyclymenia sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Platyclymeniidae : Platyclymenia370.6 - 364.7 Ma
Late/Upper Devonian
Platyclymenia montana
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Platyclymeniidae : Platyclymenia : Platyclymenia montana370.6 - 364.7 Ma
Late/Upper Devonian
Pleuroclymenia americana
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Platyclymeniidae : Pleuroclymenia : Pleuroclymenia americana370.6 - 364.7 Ma
Late/Upper Devonian
Pernoceras crebriseptum
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Kirsoceratidae : Pernoceras : Pernoceras crebriseptum370.6 - 364.7 Ma
Late/Upper Devonian
Raymondiceras simplex
species
7Animalia : Mollusca : Cephalopoda : Goniatitida : Prolobitidae : Raymondiceras : Raymondiceras simplex370.6 - 364.7 Ma
Late/Upper Devonian
Tornoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonoidea : Tornoceratidae : Tornoceras370.6 - 364.7 Ma
Late/Upper Devonian

References

Rode A. L., Lieberman B. S. (2004) Using GIS to unlock the interactions between biogeography, environment, and evolution in middle and Late Devonian brachiopods and bivalves, Palaeogeography, Palaeoclimatology, Palaeoecology 211 3-4, 345-359
Korn D., Titus A. (2006) The ammonoids from the Three Forks Shale (Late Devonian) of Montana., Fossil Record 9 2, 198-212
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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